<template>
      <el-container class="home-container">
        <!--头部-->
        <el-header>
          <div>
            <img src="../assets/heima.png" alt="">
            <span>电商后台管理系统</span>
          </div>
          <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <!--页面主题区-->
        <el-container>
          <!--侧边栏-->
          <el-aside :width="isCollapse ? '64px':'200px'">
            <div class="toggle-button" @click="toggleCollapse">|||</div>
            <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" unique-opened :collapse="isCollapse" :collapse-transition="false"
                     router :default-active="activePath">
              <!--一级菜单-->
              <!--:index="item.id +''" id是数值，而index中放字符串，所有+'' 数值＋字符串等于字符串-->
              <el-submenu :index="item.id +''" v-for="item in menulist" :key="item.id">
               <!-- 一级菜单模板-->
                <template slot="title">
                  <i :class="iconObj[item.id]"></i>
                  <span>{{item.authName}}</span>
                </template>
                  <!--  二级菜单-->
                <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
                    <template slot="title">
                      <i class="el-icon-menu"></i>
                      <span>{{subItem.authName}}</span>
                    </template>
                </el-menu-item>
              </el-submenu>
            </el-menu>
          </el-aside>
          <!--右侧内容主体-->
          <el-main>
            <!--路由占位符-->
            <router-view></router-view>
          </el-main>
        </el-container>
      </el-container>
</template>

<script>
  export default {
    data(){
      return{
        //左侧菜单数据
        menulist:[],
        iconObj:{
          '125':'iconfont icon-user',
          '103':'iconfont icon-tijikongjian',
          '101':'iconfont icon-shangpin',
          '102':'iconfont icon-danju',
          '145':'iconfont icon-baobiao'
        },
        isCollapse:false,
        activePath:''
      }
    },
    created(){
      this.getMenuList()
      this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods:{
      logout(){
        window.sessionStorage.clear();
        this.$router.push("/login")
      },
      async getMenuList(){
        const {data:res } = await this.$http.get('menus')
        if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
        this.menulist = res.data
        console.log(res)
      },
      //点击按钮切换菜单的折叠和展开
      toggleCollapse(){
        this.isCollapse = !this.isCollapse
      },
      //保存链接的激活状态
      saveNavState(activePath){
         window.sessionStorage.setItem('activePath',activePath)
        this.activePath = activePath
      }
    }
  }
</script>

<style lang="less" scoped>
  .home-container{
    height: 100%;
  }
  .el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    >div{
      display: flex;
      align-items: center;
      span{
        margin-left: 15px;
      }
    }
  }
  .el-aside{
    background-color: #333744;
    .el-menu{
      border-right: none;
    }
  }
  .el-main{
    background-color: #EAEDF1;
  }
  .iconfont{
    margin-right: 10px;
  }
  .toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
</style>
